Richard Mele of Breezy Point, N.Y., on Tuesday looks over some fishing tackle he salvaged from his flooded home.

By Miranda Leitsinger and Miguel Llanos, NBC News

BREEZY POINT, N.Y. -- With a nor'easter expected by Wednesday afternoon, residents of the areas hardest hit by Superstorm Sandy were urged to leave and, in some cases, ordered to. Some airlines also announced cancellations at New York area airports starting Wednesday afternoon.

“Everything we own is outside on the porch. It’s all awash, literally, it’s awash,” she laughed. “Nothing else you can do.”

The worst flooding is expected "at high tide, mainly along northern and northeast-facing beaches," weather.com reported, "but will be much lower than the magnitude of Sandy's coastal flooding."

Temperatures across the Northeast have been dipping into the low 30s, and nearly one million homes and businesses remained without power as of Tuesday morning.

The updated forecast now calls for snow.

"Cold air will wedge itself along the I-95 corridor to bring some accumulating snows from Delaware to Maine," the weather service's prediction center stated. "A few inches are possible" in cities like New York, Boston and Philadelphia, it added.

The incoming storm will create additional storm surge, wind, and more power outages for the already besieged East Coast. Weather Channel meteorologist Jim Cantore reports.

In Point Pleasant Beach, N.J., Laura DiPasquale on Monday frantically searched dozens of trash bags that volunteers had stuffed full of her household belongings and brought to the curb, trying to make sure nothing she intended to keep had gotten tossed out with debris.

"I don't know where anything is; I can't even find my checkbook," she told The Associated Press. "I have no idea what's in any of these bags. And now another storm is coming and I feel enormous pressure. I don't know if I can do this again. It is so overwhelming."